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186772 (2004 DQ20)
Classification: Main-belt Asteroid          SPK-ID: 2186772
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07895447853995453 3.1913e-08  
a 2.281609390294515 1.039e-08 au
q 2.101466110651948 7.3633e-08 au
i 6.365312724625889 4.4752e-06 deg
node 113.5381806034614 3.372e-05 deg
peri 295.968025321793 4.5378e-05 deg
M 58.98497766389541 2.989e-05 deg
tp 2458994.247467990938
(2020-May-24.74746799)
0.00010469 TDB
period 1258.810538953734
3.45
8.5988e-06
2.354e-08
d
yr
n .285984259632284 1.9535e-09 deg/d
Q 2.461752669937082 1.1211e-08 au
  Orbit Determination Parameters
   # obs. used (total)      550  
   data-arc span      9352 days (25.60 yr)  
   first obs. used      1995-07-30  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55486  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:52:38  

Additional Information
 Earth MOID = 1.12049 au 
 Jupiter MOID = 2.7797 au 
 T_jup = 3.593 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.49   n/a MPCxxxxx  
rotation period rot_per 5.52 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

186772 (2004 DQ20)          Discovered 2004-Feb-17 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 2004 DQ20 = 2002 RG213 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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